Roof Framing Nomenclature

Common types of roofs and basic framing terms.

Roof framing nomenclature.

Collar tie also collar beam in profile the framing of a conventional pitched roof forms a triangle. On any wall panel or framing piece the beams that run horizontal at the very top and bottom of the frame are called plates. Sway bracing there are a few ways to sway brace the wall. Standard stick framing or the newer truss framing.

Mirrored pairs of rafters meet at a ridge and are connected across the base by a ceiling joist. Nearly all roofs are framed using one of two methods. Framing consists of a doubled valley rafter in the middle that extends from a top plate corner to a second ridge board with angled jack rafters for support. This is to help prevent deflection and sag in the roof.

An example of each is shown in figure 2 1. Stick truss roof framing. At the top of a wall panel you have a top plate and at the bottom you ll have a bottom plate. The top horizontal framing members of a framed wall.

Overhangs hips and dormers add greatly to the complexity of the framing. Types of roofs the most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to. However green building uses a single top plate and ensures that rafters and ceiling joists sit on the plate directly over the studs. The inherent strength and integrity of the triangular form makes the roof a sound structure.

It is the form most commonly used by the navy. Definition of structural ridge or ridge beam used in roof framing a structural ridge beam is a horizontal beam placed at the peak or ridge of a roof and is designed to carry much of the live and dead loads or weight of the roof structure by itself. Roof framing can be simple or complex depending on the roof. Top plate or plates in conventional western platform framing there are two top plates.

It is simple in design economical to construct.